<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>1.验证diffing算法</title>
</head>
<body>
    <!-- 准备好一个容器 -->
    <div id="test"></div>

    <!-- 引入react核心库 -->
    <script src="../js/17/react.development.js" ></script>
    <!-- 引入react-dom，用于支持react操作DOM -->
    <script src="../js/17/react-dom.development.js"></script>
    <!-- 引入babel，用于将jsx转为js -->
    <script src="../js/babel.js" ></script>
    <script type="text/babel"> /*此处一定要写babel，否则无法识别jsx语法*/
        // 创建组件
        // 验证diffing算法存在，输入框输入值，不变化，时间一直在刷新
        class Time extends React.Component{
            state = {
                date: new Date()
            }
            componentDidMount () {
                setInterval(() => {
                    this.setState({
                        date: new Date()
                    })
                },1000)
            }
            render () {
                return (
                    <div>
                        <h1>hello</h1>
                        <input type="text" />
                        <span>现在是： {this.state.date.toTimeString()}</span>
                    </div>
                )
            }
        }
        ReactDOM.render(<Time />, document.getElementById('test'))
    </script>
</body>
</html>